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  • In 2018, SpaceX will launch a new GPS satellite for the US Air Force. GPS has been vital for

  • militaries, governments, businesses, and everyday navigation for decades. So who actually owns

  • the Global Positioning System?

  • Well, officially GPS was created, launched, and maintained by the United States, specifically

  • by the Air Force Space Command. The idea originally came after Russia launched the first ever

  • satellite, Sputnik. American scientists realized that they were able to calculate their position

  • by interpreting the signal sent down from the satellite.

  • Around the start of the Cold War, the US was secretly working on a way to increase the

  • accuracy of their nuclear warheads, as a deterrent to the Soviet Union. By the 1980s, the positioning

  • system was conceptually operational, but limited to military use. However, in 1983, a Korean

  • Air Lines flight was shot down over Russia after accidentally entering prohibited airspace.

  • The event galvanized both sides of the Cold War, and in an effort to avoid similar accidents

  • from jeopardizing peace, President Ronald Reagan announced the existence of the Global

  • Positioning System, and promised to make it available for civilians when it was fully

  • up and running.

  • About a decade later, in 1994, the first twenty-four satellites necessary for accurate coverage

  • were launched, at the total expense of about 10 to 12 billion dollars, plus hundreds of

  • millions of dollars a year in maintenance. Despite Reagan’s promise to make the system

  • available to the public, civilians were limited to a weaker, and intentionally degraded signal,

  • calledSelective Availability”. Until May 2000, this secondary signal assured the

  • US military an advantage, in case an enemy were to use their own GPS against them. With

  • the development of new technologies, this advantage soon became irrelevant, and President

  • Bill Clinton removed the restrictions for civilians.

  • Today, GPS is maintained by the US Department of Defense, and includes members from the

  • Department of Homeland Security, the Joint Chiefs of Staff, and NASA. In fact, the DOD

  • is required by law to maintain continuous, worldwide standard positioning services, due

  • to its use in transportation, public safety, economy, science, timing, and especiallysafety

  • of lifenavigation in the air and water. GPS’s operating cost is roughly estimated

  • at 750 million dollars a year. But despite its ubiquity, the US isn’t the only country

  • to run a global positioning system.

  • Both India and Russia have also developed global positioning systems. Russia’s GLONASS

  • system was developed around the same time as GPS, however it did not manage to reach

  • the same level of global coverage until roughly a decade after the US’s system. It is primarily

  • used by the Russian military, and today actually provides a more accurate reading of about

  • 2 to 3 meters, compared to GPS’s, at best, 3.5 meters. The Indian Regional Navigation

  • Satellite System was only finished in 2016, and is not yet fully operational, and additionally

  • only covers India and the surrounding regions, making it not nearly as useful as GLONASS

  • or GPS. China, Japan, and the European Union are also developing similar systems, but are

  • much farther behind.

  • GPS is integral to many navigational systems we use around the world for both military

  • and civilian purposes. Every country in the world can use GPS, free of charge; but ultimately,

  • it is owned and operated exclusively by the United States.

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  • Pretty much everyone who owns a smartphone has access to GPS, but how exactly does it

  • track your location? Find out in this video from DNews! Thanks for watching

  • Seeker Daily. Make sure to like and subscribe for new videos every day.

In 2018, SpaceX will launch a new GPS satellite for the US Air Force. GPS has been vital for

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有人真的擁有GPS嗎? (Does Someone Actually Own GPS?)

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    gotony5614.me97 發佈於 2021 年 01 月 14 日
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